Performance
Lab data — simulated mobile 9
Before 31 After
Lab metrics
Metric
Before
With Turbulence
Speed Index SI
Before: 19 s
After: 9.3 s -51%
First Contentful Paint FCP
Before: 2.3 s
After: 2.0 s -14%
Largest Contentful Paint LCP
Before: 33 s
After: 11 s -67%
Cumulative Layout Shift CLS
Before: 1.520
After: 0.336 -78%
Total Blocking Time TBT
Before: 2.3 s
After: 676 ms -71%
What changed (1)
- Resource hints injected Browser knows what to fetch early
How we measured this
- 1. We fetched your page and scored it with PageSpeed Insights (mobile, lab data).
- 2. We re-fetched it through a Turbulence preview environment that applies our transformation pipeline.
- 3. We scored the result with PageSpeed Insights again.
- 4. The deltas above are the difference — a directional estimate, not a forecast. First visits, geographic location, network conditions, and JS-rendered content all affect real-world results.